New virus

Julian Field MailScanner at ecs.soton.ac.uk
Thu Jan 12 19:33:26 GMT 2006


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Kevin Miller wrote:
> Julian Field wrote:
>   
>> Scott Silva wrote:
>>
>>     
>>> Julian Field spake the following on 1/12/2006 6:23 AM:
>>>
>>>
>>>       
>>>> The filename.rules.conf should by default be trapping *.hta files,
>>>> even inside zip files. So it should still be caught by MailScanner,
>>>> even without the AV engines. 
>>>>
>>>>
>>>>
>>>>         
>>> But having Maximum Archive Depth = 0 will prevent MailScanner from
>>> catching this in zip files, won't it?
>>>
>>>
>>>       
>> Yes. That is your choice to use that setting, I don't personally
>> advise it. 
>>     
>
> What are the implications of setting Maximum Archive Depth = 2 (the
> default IIRC) and Allow Password-protected Archives = no?  Will that
> break anything?
>
> The comments indicate that the archive depth should be set to 0 if
> disabling password-protected archives.  I have a rules file for password
> protected archives, but it defaults for no.  I like the protection from
> the passworded zip virus files, but would also like to insure that I'm
> protected on the hta, etc. front.
>
> And if I do set the archive depth back to 2, won't I start putting the
> kiebosh on legitimate .exe, and other files that folks zip to get past
> the normal attachment checking?  Don't know how much of an issue that is
> right now but you know how users can get....
>
> ...Kevin
>   
Yes, if you put the archive depth to 2, people won't be able to hide 
exes by putting them in zip files.
If you do that, you will definitely need a way for users to pull files 
out of quarantine.

-- 
Julian Field
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PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654


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